(Very) Hard AND nice puzzles
The following list contains portal puzzles that have been rated as nice or very nice and that are difficult. These puzzles are recommended for experts - and allow some time to solve.
| Description | solved | Rating | |
|---|---|---|---|
 | Friendly Doublers by AstralSky (on 1. February 2023, 18:41) | 12 |  98 % |
| Nestification Jigsaw by Lyun Licuss (on 28. February 2023, 17:15) | 15 | 100 % |
| Double Ender by dodomos (on 15. September 2023, 10:00) | 12 | 90 % |
| Momohime's Human Beatbox Party by Morisenseiisgod (on 12. December 2023, 15:24) | 11 | 98 % |
| Skyline by XeonRisq (on 1. June 2024, 22:00) | 11 | 98 % |
| Wichtels Rätselsommer 2024 (8): Kakuro-Messfehler by wichtel (on 17. September 2024, 20:23) | 24 | 99 % |
| Numb Numerals by kieserel (on 22. November 2024, 08:42) | 12 | 95 % |
| upcoming upheaval by aqjhs (on 24. February 2025, 00:00) | 10 | 90 % |
| Reflections (Antiknight Killer Sudoku) by Phistomefel (on 11. September 2022, 12:34) | 165 | 96 % |
| Numbered Cave Fillomino by Agent (on 27. December 2022, 09:00) | 50 | 99 % |
| Acropora (Chaos Construction) by Agent (on 13. June 2023, 09:00) | 84 | 98 % |
| Thermo Killer Sudoku X by Jeet Sampat (on 10. November 2021, 23:56) | 27 | 95 % |
| Bose-Einstein Condensate (S-cells) by purpl (on 18. January 2022, 17:34) | 23 | 99 % |
| Gonna (Kouchoku) by Wessel Strijkstra (on 21. October 2022, 12:39) | 24 | 95 % |
| First Burn by dennischen (on 4. May 2023, 08:22) | 28 | 95 % |
| Always on the loockout ! [Lockout Lines Deconstruction] by Christounet (on 12. August 2023, 00:09) | 48 | 99 % |
| Algebra 101 (Cipher X-Sum) by tallcat (on 29. April 2023, 09:00) | 35 | 94 % |
| Cavino Seguito (Canal View Nonogram) by PrimeWeasel (on 18. April 2024, 09:10) | 40 | 98 % |
| Anti-Knight Killer Sudoku by trivial171 (on 4. May 2020, 00:46) | 56 | 95 % |
| Tower Defence #2 by Feadoor (on 17. March 2020, 09:40) | 15 | 95 % |
